/Engine/Plugins/Importers/USDImporter/Source/USDStage/Public/USDLevelSequenceHelper.h
Adds the necessary tracks for a given prim to the level sequence. If bForceVisibilityTracks is true, will add visibility tracks even if this prim doesn't actually have timeSamples on its visibility attribute (use this when a parent does have animated visibility, and we need to "bake" that out to a dedicated visibility track so that the standalone LevelSequence asset behaves as expected)
void AddPrim ( [UUsdPrimTwin](API\Plugins\USDStage\UUsdPrimTwin) & PrimTwin, bool bForceVisibilityTracks )